I was on Reddit since almost the beginning and I would not say it's similar, but I also don't think that culture exists on the internet anymore, closest thing might be tildes?
What I really miss is the intelligent conversion and actual debate in the comments. People don't really lay out arguments anymore, complete with sources and logical conclusions. Back in the early days of Reddit you'd be downvoted and told off if you made a claim without evidence. Anecdotal evidence, speculation, and bias were called out. There were still jokes and light comment sections, but comments aiming to make a point were essays where you could actually learn something. Might sound exhausting to some, but it feels like the internet has turned into just upvoting whatever confirms your bias, whether there's evidence of it or not. I'm sure you can find some excellent examples in the old r/bestof posts.
The content was a lot different too, the community was just a lot more scientific. Studies were posted over articles, and clickbait articles (before they were even clickbait) were called out as not having substantial content or evidence. Even studies were heavily scrutinized by identifying the bias in the methodology.
There were a lot less communties (subreddits) too, which I think lead to healthier discussion overall and less of an echo chamber effect. It was still always criticized as being a "hive mind", but it felt less like one to me back then anyways.
I guess overall it feels like the main difference is everything nowadays is meant to radicalize you, or get a reaction out of you. Back in the day if something political or scientific was being shared it was shared with the intention of changing minds, not confirming bias.
Anyways, that's my old person rant. I'm probably looking at it all through rose tinted nostalgia glasses, but there's definitely been a shift in how we communicate on the internet for better or for worse.